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Kinetic modelling of methanation reaction over a CoMo/SiO2 catalyst

1994; Wiley; Volume: 60; Issue: 1 Linguagem: Inglês

10.1002/jctb.280600116

1097-4660

Hong Chen, Adesoji A. Adesina,

Catalysts for Methane Reforming

Abstract The methanation kinetics of CO over a bimetallic catalyst containing 6Co:1 Mo:4K:100SiO 2 has been studied and compared with that over a 6Co:4K:100SiO 2 monometallic catalyst. Nine models arising from carbide, enolic and Eley–Rideal mechanisms were considered and assessed with respect to the rate data obtained for each catalyst. Interestingly, all three models which were considered statically adequate involved the dissociative adsorption of H 2 as the rate‐determining‐step (RDS). The modelling results also suggest that the introduction of Mo to Co altered the methanation behaviour of CO over cobalt kinetically but not mechanistically.